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From Tim Funk <>
Subject Re: Tomcat 4.1.29 versus Tomcat 5
Date Tue, 13 Jan 2004 11:57:30 GMT
Going from 4.1 to 5 should be easier than going from 4.0 to anything.

If all your webapps are container agnostic - the upgrade should be pretty easy.

If you have custom realms, valves, they might need some re-write. (But it 
really depends on what you did. Some Valve, Realm code is still identical in 
4.1 and 5)


Daniel Gibby wrote:
> Great, I'm sold! OK, so what are the biggest problems there have been in 
> upgrading?
> What do you mean an app running on 4.x may not work on 5.0.x? Is this 
> only because of changes in the JSP spec, and older 1.2 is not compatible 
> with the 2.0 spec?

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